JPS6149637A - Preparation of sheathing structure for miniature motor - Google Patents

Abstract

PURPOSE:To obtain a stator of high radiation effect facilitating the production, by a method wherein after brackets are provided for the both ends of a stator wound up with a stator winding, a jig is inserted into the central section of the stator and mold agent is injected to be solidified at the end of the stator winding. CONSTITUTION:Brackets 16, 17 are provided for the both end faces of a stator core 13 wound up with a stator winding 15, and loop-formed stator winding end sections 15a protruded from the both end faces of a stator core 13 are contained in the inner spaces of the brackets 16, 17. Then, a jig 19 is inserted into the penetration slot of the stator core 13, and ring-formed spaces 21, 21a for the stator winding end sections 15a surrounded with the jig 19, the brackets 16, 17 and the stator core end faces are formed. Mold agent 22 is injected into the ring-formed spaces 21, 21a, and even if the jig 19 is removed after the agent is solidified, a motor stator is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a simple method for manufacturing small motors used in motor vehicles, etc.

According to the prior art) Permanent magnet field synchronous motors and induction motors are used as small AC servo motors, in which an iron core consisting of 6 to 7 electromagnetic side plates is used as part of the motor jacket. As shown in Fig. 2, this insert motor has a laminated iron core 1 made of laminated thin steel plates 2, and a laminated iron core 1 made of laminated thin steel plates 2.
a stator winding 3 wound around the laminated iron core l, and a pair of brackets firmly fixed to both ends of the laminated iron core l with bolts 4).
5a and 5b'' constitute a support structure, one rotor 8 is mounted in a central space provided through the center of the laminated core 1, and its shaft 8a is connected to the bracket 5a.

It is rotatably supported by bearings 6 and 7 provided on 5b, respectively.

When manufacturing such a motor (I), first the fixed winding 3 is wound around the laminated iron core l, and then the loops 6'jFH3a of the winding 3 protruding from both ends of the iron core l are covered with a forming process. A mold was attached, a molding agent such as resin was injected into the mold to fix the loop ends 3a to each other, and then the mold was removed.
I installed Niburakeso T-SA and 5b to complete the outer cover groove.

Problems to be Solved by the Invention However, such a method complicates the process because it requires work to attach and detach the mold, and the loop end 3a of the winding which is impregnated and fixed with resin and the inner walls of the brackets 5a and 5b. The existence of a space 9 between the windings 3 is unavoidable, and the heat radiation from the winding 3 is hindered due to the heat insulating effect of the air present there.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art and provide a method for manufacturing a small motor with a simple manufacturing process and excellent heat dissipation effect.

Means for Solving the Problems The above purpose is to attach brackets to both ends of a laminated core having a stator winding and a through hole in the center, so that the ends of the winding protrude in a loop shape from both ends of the laminated core. is accommodated in the internal space of the bracket, and then a cylindrical jig that fits this is inserted into the through hole of the laminated core, thereby forming a forming space between the outer peripheral surface of the jig and the inner wall of the bracket. This is achieved by a method for manufacturing a jacket structure for a small motor, which is characterized in that the ends of the windings are fixed by injecting a molding agent into the molding space and filling it with the molding agent.

The configuration will be explained in more detail based on the embodiment of the present invention shown in the drawings.

FIG. 3 shows a perspective view of a stator of a small motor to which the present invention is applied. That is, a laminated core 13 is constructed by laminating a large number of steel plates 12 of the same shape with an opening 11 in the center, and a stator winding 15 is inserted in the axial direction through a number of winding slots 14 drilled around the laminated core 13. is wound, and its end portions 15a protrude in a loop shape from both ends of the iron core.

As shown in FIG. 1, this iron core 13 is then fitted with a pair of brackets 16 and 17 on both end faces thereof.
16 and 17 are mutually tightened by a plurality of bolts 18 to integrally sandwich the iron core 13 to form a jacket structure.

The end portion 15a of the stator winding placed above is a bracket) 16.1
It is accommodated in the internal space of 7.

In this state, the forming jig 19 is inserted into the central space formed by the opening 11 of the iron core 13.

The jig 19 has a cylindrical shape, and its chest has a diameter such that the outer circumferential surface faces the inner circumferential surface of the iron core 13 with a slight clearance. It is supported in contact with the inner protrusion 17a of the bracket 17. The other end 19b of the jig 19 has a diameter that fits tightly with the inner peripheral surface of the bracket 16, and the end 19b has a plurality of holes 20 near its periphery as shown in FIG. is drilled.

By inserting this jig 19, an annular space 21.21a is formed between the inner wall of the bracket 16-17 and the end of the iron core 13, as shown in the lower half of FIG. The aforementioned loop-shaped end portion 15a of the stator winding 15 will be present. The hole 20 is inserted into this annular space 21.
communicates with the outside.

In this state, a known molding agent 22 such as epoxy resin is injected through the hole 20 and introduced into the space 21 . As shown in the upper half of FIG. 1, the molding agent first fills the inlet side space, and then passes through the clearance between the outer periphery of the jig 19 and the inner periphery of the iron core 13 and/or through the winding slot 14. It invades the space 21a at the back and fills it.

After the molding agent has solidified, the jig 19 is removed, and then the bearing, rotor, etc. are assembled in a conventional manner to complete the motor.

In the motor manufactured in this manner, the space between the end portion 15a of the stator winding and the bracket 16.17 is filled with molding agent, so that the heat generated in the winding due to heat conduction of the molding agent is quickly dissipated. Bracket 16.17
It is transmitted to the air, and from there it is dissipated into the atmosphere. Also, due to the adhesive effect of the molding agent, the iron core] 3 and bracket) 16.17
The bonding strength between them increases. Furthermore, the molding agent is applied to the end space 21.
Since it penetrates not only into the inside of the wire winding slot 14 but also into the winding slot 14, the holding force between the S cotton 15 and the iron core 13 is improved.

Effects of the Invention According to the present invention, in manufacturing the outer cover structure of a motor, the inner wall of the bracket itself can be used as a molding mold after the iron core and the bracket are integrally assembled without using a special molding mold. Since the molding agent is injected, the process can be simplified, and the heat dissipation effect and structural strength of the resulting motor can also be improved.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a motor being manufactured by the method of the present invention, FIG. 2 is a side sectional view of a motor manufactured by a conventional method, FIG. 3 is a perspective view showing the structure of a stator, and FIG. The figure is a front view of the inlet side end face of the jig used in the present invention. 13--Laminated core 14--Slot 16.17--Bracket 15a--Stator winding end 19-Jig 22-Molding agent 5. Trigram 1) Medicine 1 Figure 2

Claims (1)

[Claims] 1. A bracket is attached to both ends of a laminated core that includes a stator winding and has a through hole in the center, and the ends of the winding that protrude in a loop shape from both ends of the laminated core are accommodated in the internal space of the bracket, Next, a fitting cylindrical jig is inserted into the through hole of the laminated core, a molding space is formed between the outer peripheral surface of the jig and the inner wall of the bracket, and a molding agent is applied into the molding space. A method of manufacturing a jacket structure for a small motor, characterized in that the ends of the windings are fixed by injecting and filling the same.